US20220065265A1 - Electric liquid pump - Google Patents
Electric liquid pump Download PDFInfo
- Publication number
- US20220065265A1 US20220065265A1 US17/523,387 US202117523387A US2022065265A1 US 20220065265 A1 US20220065265 A1 US 20220065265A1 US 202117523387 A US202117523387 A US 202117523387A US 2022065265 A1 US2022065265 A1 US 2022065265A1
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- US
- United States
- Prior art keywords
- impeller
- segment
- inlet
- pump housing
- electric liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
- F04D29/4293—Details of fluid inlet or outlet
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0606—Canned motor pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/043—Shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2216—Shape, geometry
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
- F04D29/4273—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps suction eyes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/50—Inlet or outlet
- F05D2250/51—Inlet
Definitions
- the invention relates to an electric liquid pump, in particular to an coolant pump for a vehicle.
- An electric liquid pump generally includes a pump housing, a motor connected to the pump housing, and an impeller housed in the pump housing and driven by the motor.
- the pump housing is provided with a columnar inlet port and a columnar outlet port.
- the motor includes a stator and a rotor rotatably installed in the stator.
- the rotor includes a rotation shaft and a rotor body surrounding the outer circumference of the rotation shaft, and the impeller is drivn to rotate via the rotation shaft.
- the impeller has an impeller inlet located in the center thereof and an impeller outlet located on the peripheral side thereof.
- the inlet port, the impeller inlet, the impeller outlet and the outlet port are in flow connection sequentially. In working of the electric liquid pump with afromentioned structur, liquid enters the inlet of the impeller from the inlet port, which generates large noise and poor performance.
- an electric liquid pump includes a pump housing, a motor connected to the pump housing, and an impeller housed in the pump housing and driven by the motor.
- the pump housing is provided with an inlet port and an outlet port.
- the impeller has an impeller inlet at the center thereof and an impeller outlet at a peripheral side thereof.
- the inlet port, the impeller inlet, the impeller outlet, and the outlet port are in flow connection sequentially.
- the inlet port comprises a columnar first segment and a second segment extending from the first segment. The second segment is close to the impeller inlet with a mouting seat formed therein.
- the impeller is sleeved on a rotation shaft. One end of the rotation shaft is engaged in the mounting seat.
- the impeller is rotatable relative to the mounting seat.
- the mounting seat is partially received in the impeller inlet.
- a gap between the mounting seat and an inner wall of the impeller inlet is defined as a flow passage for liquid.
- a ratio of a minimum width of the flow passage to an inner diameter of the first segment is greater than 23% and less than or equal to 35%.
- the ratio of a minimum width of the flow passage to an inner diameter of the first segment is greater than or equal to 25% and less than or equal to 35%.
- the ratio of a minimum width of the flow passage to an inner diameter of the first segment is 30%.
- a radial gap is formed between the impeller and an inner side wall of the pump housing, a ratio of a minimum value of a width of the radial gap to a diameter of the impeller is greater than 4% and less than or equal to 10%
- the ratio of the minimum value of the radial gap, which is formed between the impeller and an inner side wall of the pump housing, to the diameter of the impeller is greater than or equal to 5% and less than or equal to 10%.
- the ratio of the minimum value of the radial gap, which is formed between the impeller and an inner side wall of the pump housing, to the diameter of the impeller is 8%.
- the second segment of the inlet port of the pump housing is conical, with an inner diameter gradually increases in a direction away from the first segment, and a minimum value of the inner diameter of the second segment is equal to the inner diameter of the first segment.
- the impeller comprises an main body and a cover plate mounded on the main body, and the impeller inlet is defined in the cover plate.
- a plurality of ribs extends from an inner surface of the second segment to support the mounting seat, and the ribs are spaced from each other and arranged around the mounting seat.
- the present invention can reduce the noise during the operation of the electric liquid pump and improve its working performance.
- FIG. 1 is a perspective view of a fluid pump according to an embodiment of the present invention
- FIG. 2 is an exploded view of the electric liquid pump shown in FIG. 1 ;
- FIG. 3 is a longitudinal section-view of the electric liquid pump shown in FIG. 1 ;
- FIG. 4 is a bottom view of the pump housing of the electric liquid pump shown in FIG. 1 ;
- FIG. 5 is a longitudinal section-view of the pump housing and impeller shown in FIG. 4 ;
- FIG. 6 is a transverse section-view of the pump housing and impeller of the electric liquid pump shown in FIG. 1 ;
- FIG. 7 is an exploded view of an impeller of the electric liquid pump shown in FIG. 1 .
- an electric liquid pump 100 can be used as an automobile coolant pump.
- the electric liquid pump 100 includes a pump housing 10 , a motor 50 connected to the pump housing 10 , and an impeller 30 housed in the pump housing 10 and driven by the motor 50 (shown in FIG. 2 ).
- the pump housing 10 is provided with a inlet port 11 and a outlet port 12 .
- the impeller 30 has an impeller inlet 33 at a center thereof and an impeller outlet 34 at a peripheral side thereof.
- the inlet port 11 , the impeller inlet 33 , and the impeller outlet 34 and the outlet port 12 are in flow connection sequentially.
- the motor 50 drives the impeller 30 to rotate when it is working, so that liquid enters the impeller 30 from the inlet port 11 and the impeller inlet 33 , and then discharged outside from the impeller outlet 34 and the outlet port 12 .
- the motor 50 is an inner rotor motor, and includes a stator and a rotor rotatably installed in the stator.
- the stator includes a cylindrical stator housing 61 , a cylindrical stator inner housing 71 housed in the stator housing 61 , and a stator body arranged between the stator housing 61 and the stator inner housing 71 .
- the stator body includes a stator core 62 , a stator winding 63 wound to the stator core 62 .
- the first end of the stator housing 61 is hermetically connected to the pump housing 10 .
- the rotor is housed in the stator inner housing 71 .
- the stator inner housing 71 includes a main body 711 with an open end and an flange 712 formed at the open end of the main body 711 .
- the flange 712 is hermetically connected to the pump housing 10 and is clamped between the housing 61 and the first end of the pump housing 10 .
- a pump chamber 104 is defined between flange 712 and the pump housing 10 to accommodate the impeller 30 .
- the main body 711 is cylindrical, and defines an inner space 715 communicating with the pump chamber 104 .
- the impeller 30 is adjactent to the open end of the main body 711 .
- a fixed seat 714 is formed in the maim body 711 closed to the bottom of the inner space 715 .
- the rotor includes a rotation shaft 72 and a ring-shaped rotor body rotatable around the rotation shaft 72 .
- the rotor body is integrated with a main body 31 of the impeller 30 through a connecting piece 40 as one a piece mmber.
- the connecting member 40 is an injection-molded mebmer.
- the connecting piece 40 and the main body 31 are integrally injection-molded.
- the rotor body is fixedly sleeved to the outer circumference of the connecting member 40 .
- the connecting piece 40 is sleeved on the rotation shaft 72 . An end of the rotation shaft away from the impeller 30 is engaged into the fixing seat 714 .
- the inlet port 11 includes a columnar first segment 111 and a conical second segment 112 connected to the first segment 111 .
- the second segment 112 is close to the impeller inlet 33 with a mouting seat 113 formed therein.
- the cross-sectional shape of the mounting seat 113 is preferably cone-shaped.
- the rotation shaft 72 passes through the impeller 30 and is engaged with the mounting seat 113 .
- the rotor body rotates relative to the rotation shaft 72 under the action of the magnetic field of the stator core 62 , to drive the impeller 30 , through the connecting member 40 , to rotate relative to the rotation shaft 72 and the mounting seat 113 , thereby liquid being urged to enter the impeller 30 via the inlet port 11 and then the impeller inlet 33 , and then discharging out of the pump from the impeller outlet 34 and the outlet port 12 .
- the impeller inlet 33 is aligned with the second segment 112 .
- the mounting seat 113 is partially received in the impeller inlet 33 .
- a gap between the mounting seat 113 and the inner wall of the impeller inlet 33 is defined as a flow passage 13 for the liquid.
- a ratio of a minimum width of the flow passage 13 to an inner diameter D 1 of the first segment 111 is greater than 23% and less than or equal to 35%.
- the ratio of the minimum width of the flow passage 13 to the inner diameter D 1 of the first segment 111 is greater than or equal to 25% and less than or equal to 35%.
- the ratio of the minimum width of the flow passage 13 to the inner diameter D 1 of the first segment 111 is 30%.
- the second segment 112 is conical, with an inner diameter gradually increaing in a direction away from the first segment 111 .
- a minimum value of the inner diameter of the second segment 112 is equal to the inner diameter D 1 of the first segment 111 .
- a plurality of ribs 114 extends from an inner surface of the second segment 112 to support the mounting seat 113 .
- the ribs 114 are spaced from each other and arranged around the mounting seat 113 . In the embodiment, there are three ribs 114 .
- the end of the rotation shaft 72 closed to the impeller 30 is sleeved with a upper bushing 91 rotatable relative to the rotation shaft 72 .
- the main body 31 of the impeller 30 is fixedly engaged with the upper bushing 91 .
- the upper bushing 91 is integrated with the main body 31 by by insert molding.
- the rotation shaft 72 is also sleeved with a bushing support 92 and a lower bushing 93 that can rotate relative to the rotation shaft 72 .
- Opposite ends of the bushing support 92 respectively support the upper bushing 91 and the lower bushing 93 .
- the lower bushing 93 is located at the end of the rotation shaft 72 away from the impeller 30 , and adjacent to the fixing seat 714 .
- a first washer 95 is interposed between the lower bushing 93 and the fixing seat 714 to prevent the fixing seat 714 from being worn out due to directly rubbing against the lower bushing.
- the connecting member 40 is fixedly sleeved to the bushing support 92 and the lower bushing 93 .
- the connecting member 40 is injection-molded around the bushing support 92 and the lower bushing 93 .
- the impeller 30 , the upper bushing 91 , the bushing support 92 and the lower bushing 93 can be driven to rotate relative to the rotation shaft 72 through the connecting member 40 .
- the impeller 30 includes the main body 31 and a cover plate 32 mounded on the main body 31 .
- the impeller inlet 33 is defined in the cover plate 32 .
- the mounting seat 113 is partially located in the impeller inlet 33 .
- the main body 31 defines the impeller outlet 34 .
- a second washer 94 is sleeved on the end of the rotation shaft 72 near the impeller.
- the second washer 94 is located between the upper bushing 91 and the mounting seat 113 to prevent the mounting seat 113 from being worn out due to directly rubbing against the upper bushing 91 .
- the second washer 94 includes a plurality of claws 941 to connecting with the mounting seat 113 , and a part of the mounting seat 113 located in the impeller inlet 33 has a pluarity of grooves 115 for correspondingly engaging with the claws 941 .
- the number of claws 941 is three, and the number of grooves 115 is also three.
- the rotor body includes a rotor core 73 , a pluraltiy of permanent magnets 74 embedded in the rotor core 73 , and a protective sleeve 75 covering circumferential surface and opposite end surfaces of the rotor core 73 .
- the permanent magnets 74 are square. In one embodiment, there are four permanent magnets 74 facing each other in pairs.
- the bushing support 92 and the lower bushing 93 are fixedly sleeved on the rotor core 73 through the connecting piece 40 .
- the connecting member 40 includes a ring-shaped first connecting portions 41 and a second connecting portions 42 on outer periphery of the connecting member 40 and opposite to each other.
- the rotor core 73 is fixedly sleeved on the connecting member 40 and sandiwiched between the first connecting portion 41 and the second connecting portion 42 .
- the first connecting portion 41 and the second connecting portion 42 are respectively fixed to oppsite ends of the protective sleeve 75 , thereby fixing the rotor body to the connecting piece 40 .
- a width of the radial gap 14 is defined as a distance between the inner wall of the pump housing 10 and a peripheral side of the impeller 30 along a radial direction of the impeller 30 .
- the ratio of a minimum value of the width of the radial gap 14 to a diameter D 2 of the impeller 30 is greater than 4% and less than or equal to 10%.
- the ratio of the minimum value of the width of the radial gap 14 to the diameter D 2 of the impeller 30 is greater than or equal to 5% and less than or equal to 10%. Further preferably, the ratio is 8%.
- the pump housing 10 is a volute casing. Therefore, the minimum value of the width of the radial gap 14 should be the radial width between the starting point of the volute profile of the pump housing 10 and the peripheral side of the impeller 30 . Based on this configuration, when the electric liquid pump 100 words, liquid can flows to the outlet port 12 via the impeller outlet 34 and the radial gap 14 with low noise, so that noise of the electric liquid pump 100 can also be reduced.
- the main body 31 of the inpeller 30 includes a bottom plate 311 , a hub 312 located at the center of the bottom plate 311 , and a plurality of arc-shaped blades 313 extending from the hub 312 to the outer periphery of the bottom plate 311 .
- the arc-shaped blades 313 are arranged on the bottom plate 311 at intervals and located between the bottom plate 311 and the cover plate 32 .
- the hub 312 is injection molded onto the upper bushing 91 .
- the center of the cover plate 32 has the impeller inlet 33 , and the impeller outlet 34 is formed between the radially outer ends of two adjacent arc-shaped blades 313 .
- the stator housing 61 is sleeved by a a plastic bracket 65 to protect the stator housing 61 .
- a first chamber 611 and a second chamber 612 are formed in the stator housing 61 and arranged axially.
- the stator core 62 and the stator inner housing 71 are installed in the first chamber 611 .
- a drive circuit 80 is installed at one end of the stator housing 61 and received in the second chamber 612 .
- the drive circuit 80 is electrically connected to the stator winding 63 for power supply of the stator winding 63 .
- stator inner casing 71 and the pump housing 10 Since the stator inner casing 71 and the pump housing 10 is hermetically connected, the first chamber 611 , the stator core 62 , the second chamber 612 and the drive circuit 80 will not be soaked by the liquid in the inner space 715 of the stator inner housing 71 and the pump chamber 104 to prevent the stator or the drive circuit 80 from be damaged by the liquid.
- the main body 711 of the stator inner housing 71 is located in a space enclosed by a number of stator teeth of the stator core 62 .
- the flange 712 of the stator inner housing 71 rests on the end of the stator housing 61 closed to the first chamber 611 .
- the pump housing 10 and the flange 712 are sequentially fixed to the stator housing 61 with fasteners such as screws, The configuration is convenient for disassembly and assembly.
Abstract
Description
- This non-provisional patent application is a continuation application of PCT Application No. PCT/CN2020/088977, filed with the Chinese Patent Office on May 9, 2020, which claims priority to Chinese Patent Application No. 201910388656.8, filed on May 10 2019, all of which are incorporated herein by reference in their entirety.
- The invention relates to an electric liquid pump, in particular to an coolant pump for a vehicle.
- An electric liquid pump generally includes a pump housing, a motor connected to the pump housing, and an impeller housed in the pump housing and driven by the motor. The pump housing is provided with a columnar inlet port and a columnar outlet port. The motor includes a stator and a rotor rotatably installed in the stator. The rotor includes a rotation shaft and a rotor body surrounding the outer circumference of the rotation shaft, and the impeller is drivn to rotate via the rotation shaft. The impeller has an impeller inlet located in the center thereof and an impeller outlet located on the peripheral side thereof. The inlet port, the impeller inlet, the impeller outlet and the outlet port are in flow connection sequentially. In working of the electric liquid pump with afromentioned structur, liquid enters the inlet of the impeller from the inlet port, which generates large noise and poor performance.
- It is the object of the present invention to provide an electric liquid pump with reduced the noise during operation of the electric liquid pump.
- According to one aspect of the present invention, an electric liquid pump is provided. The electric liquid pump includes a pump housing, a motor connected to the pump housing, and an impeller housed in the pump housing and driven by the motor. The pump housing is provided with an inlet port and an outlet port. The impeller has an impeller inlet at the center thereof and an impeller outlet at a peripheral side thereof. The inlet port, the impeller inlet, the impeller outlet, and the outlet port are in flow connection sequentially. The inlet port comprises a columnar first segment and a second segment extending from the first segment. The second segment is close to the impeller inlet with a mouting seat formed therein. The impeller is sleeved on a rotation shaft. One end of the rotation shaft is engaged in the mounting seat. The impeller is rotatable relative to the mounting seat. The mounting seat is partially received in the impeller inlet. A gap between the mounting seat and an inner wall of the impeller inlet is defined as a flow passage for liquid.
- Preferably, a ratio of a minimum width of the flow passage to an inner diameter of the first segment is greater than 23% and less than or equal to 35%.
- Preferably, the ratio of a minimum width of the flow passage to an inner diameter of the first segment is greater than or equal to 25% and less than or equal to 35%.
- Preferably, the ratio of a minimum width of the flow passage to an inner diameter of the first segment is 30%.
- Preferably, a radial gap is formed between the impeller and an inner side wall of the pump housing, a ratio of a minimum value of a width of the radial gap to a diameter of the impeller is greater than 4% and less than or equal to 10%
- Preferably, the ratio of the minimum value of the radial gap, which is formed between the impeller and an inner side wall of the pump housing, to the diameter of the impeller, is greater than or equal to 5% and less than or equal to 10%.
- Preferably, the ratio of the minimum value of the radial gap, which is formed between the impeller and an inner side wall of the pump housing, to the diameter of the impeller, is 8%.
- Preferably, the second segment of the inlet port of the pump housing is conical, with an inner diameter gradually increases in a direction away from the first segment, and a minimum value of the inner diameter of the second segment is equal to the inner diameter of the first segment.
- Preferably, the impeller comprises an main body and a cover plate mounded on the main body, and the impeller inlet is defined in the cover plate.
- Preferably, a plurality of ribs extends from an inner surface of the second segment to support the mounting seat, and the ribs are spaced from each other and arranged around the mounting seat.
- The present invention can reduce the noise during the operation of the electric liquid pump and improve its working performance.
-
FIG. 1 is a perspective view of a fluid pump according to an embodiment of the present invention; -
FIG. 2 is an exploded view of the electric liquid pump shown inFIG. 1 ; -
FIG. 3 is a longitudinal section-view of the electric liquid pump shown inFIG. 1 ; -
FIG. 4 is a bottom view of the pump housing of the electric liquid pump shown inFIG. 1 ; -
FIG. 5 is a longitudinal section-view of the pump housing and impeller shown inFIG. 4 ; -
FIG. 6 is a transverse section-view of the pump housing and impeller of the electric liquid pump shown inFIG. 1 ; -
FIG. 7 is an exploded view of an impeller of the electric liquid pump shown inFIG. 1 . - The present invention will be further described below based on the drawings and the embodiments.
- Referring to
FIG. 1 , anelectric liquid pump 100 according to an embodiment of the present invention can be used as an automobile coolant pump. Theelectric liquid pump 100 includes apump housing 10, amotor 50 connected to thepump housing 10, and animpeller 30 housed in thepump housing 10 and driven by the motor 50 (shown inFIG. 2 ). Thepump housing 10 is provided with ainlet port 11 and aoutlet port 12. Theimpeller 30 has animpeller inlet 33 at a center thereof and animpeller outlet 34 at a peripheral side thereof. Theinlet port 11, theimpeller inlet 33, and theimpeller outlet 34 and theoutlet port 12 are in flow connection sequentially. Themotor 50 drives theimpeller 30 to rotate when it is working, so that liquid enters theimpeller 30 from theinlet port 11 and theimpeller inlet 33, and then discharged outside from theimpeller outlet 34 and theoutlet port 12. - Referring to
FIGS. 2 to 5 , themotor 50 is an inner rotor motor, and includes a stator and a rotor rotatably installed in the stator. The stator includes acylindrical stator housing 61, a cylindrical statorinner housing 71 housed in thestator housing 61, and a stator body arranged between thestator housing 61 and the statorinner housing 71. The stator body includes astator core 62, a stator winding 63 wound to thestator core 62. The first end of thestator housing 61 is hermetically connected to thepump housing 10. The rotor is housed in the statorinner housing 71. The statorinner housing 71 includes amain body 711 with an open end and anflange 712 formed at the open end of themain body 711. Theflange 712 is hermetically connected to thepump housing 10 and is clamped between thehousing 61 and the first end of thepump housing 10. Apump chamber 104 is defined betweenflange 712 and thepump housing 10 to accommodate theimpeller 30. Themain body 711 is cylindrical, and defines aninner space 715 communicating with thepump chamber 104. Theimpeller 30 is adjactent to the open end of themain body 711. A fixedseat 714 is formed in themaim body 711 closed to the bottom of theinner space 715. - The rotor includes a
rotation shaft 72 and a ring-shaped rotor body rotatable around therotation shaft 72. The rotor body is integrated with amain body 31 of theimpeller 30 through a connectingpiece 40 as one a piece mmber. Preferably, the connectingmember 40 is an injection-molded mebmer. The connectingpiece 40 and themain body 31 are integrally injection-molded. The rotor body is fixedly sleeved to the outer circumference of the connectingmember 40. The connectingpiece 40 is sleeved on therotation shaft 72. An end of the rotation shaft away from theimpeller 30 is engaged into the fixingseat 714. - The
inlet port 11 includes a columnarfirst segment 111 and a conicalsecond segment 112 connected to thefirst segment 111. Thesecond segment 112 is close to theimpeller inlet 33 with amouting seat 113 formed therein. The cross-sectional shape of the mountingseat 113 is preferably cone-shaped. Therotation shaft 72 passes through theimpeller 30 and is engaged with the mountingseat 113. In work, when themotor 50 is energized, the rotor body rotates relative to therotation shaft 72 under the action of the magnetic field of thestator core 62, to drive theimpeller 30, through the connectingmember 40, to rotate relative to therotation shaft 72 and the mountingseat 113, thereby liquid being urged to enter theimpeller 30 via theinlet port 11 and then theimpeller inlet 33, and then discharging out of the pump from theimpeller outlet 34 and theoutlet port 12. - The
impeller inlet 33 is aligned with thesecond segment 112. The mountingseat 113 is partially received in theimpeller inlet 33. A gap between the mountingseat 113 and the inner wall of theimpeller inlet 33 is defined as aflow passage 13 for the liquid. A ratio of a minimum width of theflow passage 13 to an inner diameter D1 of thefirst segment 111 is greater than 23% and less than or equal to 35%. Preferably, the ratio of the minimum width of theflow passage 13 to the inner diameter D1 of thefirst segment 111 is greater than or equal to 25% and less than or equal to 35%. Further preferably, the ratio of the minimum width of theflow passage 13 to the inner diameter D1 of thefirst segment 111 is 30%. Due to this configuration, when the electricliquid pump 100 works, a noise of the the electricliquid pump 100 generated with the liquid enterring theimpeller 30 through thefirst segment 111, thesecond segment 112, and theflow passage 13, is reduced. The service life and the working performance are improved. - In this embodiment, the
second segment 112 is conical, with an inner diameter gradually increaing in a direction away from thefirst segment 111. A minimum value of the inner diameter of thesecond segment 112 is equal to the inner diameter D1 of thefirst segment 111. This configuration can help to reduce the pressure exerted on theimpeller 30 when liquid enters theimpeller 30. - A plurality of
ribs 114 extends from an inner surface of thesecond segment 112 to support the mountingseat 113. Theribs 114 are spaced from each other and arranged around the mountingseat 113. In the embodiment, there are threeribs 114. - Furtherly, the end of the
rotation shaft 72 closed to theimpeller 30 is sleeved with aupper bushing 91 rotatable relative to therotation shaft 72. Themain body 31 of theimpeller 30 is fixedly engaged with theupper bushing 91. Preferably, theupper bushing 91 is integrated with themain body 31 by by insert molding. - The
rotation shaft 72 is also sleeved with abushing support 92 and alower bushing 93 that can rotate relative to therotation shaft 72. Opposite ends of thebushing support 92 respectively support theupper bushing 91 and thelower bushing 93. Thelower bushing 93 is located at the end of therotation shaft 72 away from theimpeller 30, and adjacent to the fixingseat 714. Afirst washer 95 is interposed between thelower bushing 93 and the fixingseat 714 to prevent the fixingseat 714 from being worn out due to directly rubbing against the lower bushing. The connectingmember 40 is fixedly sleeved to thebushing support 92 and thelower bushing 93. Preferably, the connectingmember 40 is injection-molded around thebushing support 92 and thelower bushing 93. When the rotor body rotates under the action of the magnetic field of thestator core 62, theimpeller 30, theupper bushing 91, thebushing support 92 and thelower bushing 93 can be driven to rotate relative to therotation shaft 72 through the connectingmember 40. - The
impeller 30 includes themain body 31 and acover plate 32 mounded on themain body 31. Theimpeller inlet 33 is defined in thecover plate 32. The mountingseat 113 is partially located in theimpeller inlet 33. Themain body 31 defines theimpeller outlet 34. - A
second washer 94 is sleeved on the end of therotation shaft 72 near the impeller. Thesecond washer 94 is located between theupper bushing 91 and the mountingseat 113 to prevent the mountingseat 113 from being worn out due to directly rubbing against theupper bushing 91. Thesecond washer 94 includes a plurality ofclaws 941 to connecting with the mountingseat 113, and a part of the mountingseat 113 located in theimpeller inlet 33 has a pluarity ofgrooves 115 for correspondingly engaging with theclaws 941. Preferably, the number ofclaws 941 is three, and the number ofgrooves 115 is also three. - In one embodiment, the rotor body includes a
rotor core 73, a pluraltiy ofpermanent magnets 74 embedded in therotor core 73, and aprotective sleeve 75 covering circumferential surface and opposite end surfaces of therotor core 73. Thepermanent magnets 74 are square. In one embodiment, there are fourpermanent magnets 74 facing each other in pairs. Thebushing support 92 and thelower bushing 93 are fixedly sleeved on therotor core 73 through the connectingpiece 40. The connectingmember 40 includes a ring-shaped first connectingportions 41 and a second connectingportions 42 on outer periphery of the connectingmember 40 and opposite to each other. Therotor core 73 is fixedly sleeved on the connectingmember 40 and sandiwiched between the first connectingportion 41 and the second connectingportion 42. The first connectingportion 41 and the second connectingportion 42 are respectively fixed to oppsite ends of theprotective sleeve 75, thereby fixing the rotor body to the connectingpiece 40. - Referring to
FIGS. 3 and 6 , there is aradial gap 14 between theimpeller 30 and an inner sidewall of thepump housing 10. A width of theradial gap 14 is defined as a distance between the inner wall of thepump housing 10 and a peripheral side of theimpeller 30 along a radial direction of theimpeller 30. The ratio of a minimum value of the width of theradial gap 14 to a diameter D2 of theimpeller 30 is greater than 4% and less than or equal to 10%. Preferably, the ratio of the minimum value of the width of theradial gap 14 to the diameter D2 of theimpeller 30 is greater than or equal to 5% and less than or equal to 10%. Further preferably, the ratio is 8%. In one embodiment, thepump housing 10 is a volute casing. Therefore, the minimum value of the width of theradial gap 14 should be the radial width between the starting point of the volute profile of thepump housing 10 and the peripheral side of theimpeller 30. Based on this configuration, when the electricliquid pump 100 words, liquid can flows to theoutlet port 12 via theimpeller outlet 34 and theradial gap 14 with low noise, so that noise of the electricliquid pump 100 can also be reduced. - Referring to
FIGS. 2 and 7 , themain body 31 of theinpeller 30 includes abottom plate 311, ahub 312 located at the center of thebottom plate 311, and a plurality of arc-shapedblades 313 extending from thehub 312 to the outer periphery of thebottom plate 311. The arc-shapedblades 313 are arranged on thebottom plate 311 at intervals and located between thebottom plate 311 and thecover plate 32. Thehub 312 is injection molded onto theupper bushing 91. The center of thecover plate 32 has theimpeller inlet 33, and theimpeller outlet 34 is formed between the radially outer ends of two adjacent arc-shapedblades 313. - Referring to
FIG. 2 andFIG. 3 again, thestator housing 61 is sleeved by a aplastic bracket 65 to protect thestator housing 61. Afirst chamber 611 and asecond chamber 612 are formed in thestator housing 61 and arranged axially. Thestator core 62 and the statorinner housing 71 are installed in thefirst chamber 611. Adrive circuit 80 is installed at one end of thestator housing 61 and received in thesecond chamber 612. Thedrive circuit 80 is electrically connected to the stator winding 63 for power supply of the stator winding 63. - Since the stator
inner casing 71 and thepump housing 10 is hermetically connected, thefirst chamber 611, thestator core 62, thesecond chamber 612 and thedrive circuit 80 will not be soaked by the liquid in theinner space 715 of the statorinner housing 71 and thepump chamber 104 to prevent the stator or thedrive circuit 80 from be damaged by the liquid. - In one embodiment, the
main body 711 of the statorinner housing 71 is located in a space enclosed by a number of stator teeth of thestator core 62. Theflange 712 of the statorinner housing 71 rests on the end of thestator housing 61 closed to thefirst chamber 611. Thepump housing 10 and theflange 712 are sequentially fixed to thestator housing 61 with fasteners such as screws, The configuration is convenient for disassembly and assembly. - Although certain inventive embodiments of the present disclosure have been specifically described, the present disclosure is not to be construed as being limited thereto. Various changes or modifications may be made to the present disclosure without departing from the scope and spirit of the present disclosure.
Claims (10)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201910388656.8 | 2019-05-10 | ||
CN201910388656.8A CN111911419A (en) | 2019-05-10 | 2019-05-10 | Electric liquid pump |
PCT/CN2020/088977 WO2020228584A1 (en) | 2019-05-10 | 2020-05-07 | Electric fluid pump |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2020/088977 Continuation WO2020228584A1 (en) | 2019-05-10 | 2020-05-07 | Electric fluid pump |
Publications (1)
Publication Number | Publication Date |
---|---|
US20220065265A1 true US20220065265A1 (en) | 2022-03-03 |
Family
ID=73242578
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/523,387 Abandoned US20220065265A1 (en) | 2019-05-10 | 2021-11-10 | Electric liquid pump |
Country Status (5)
Country | Link |
---|---|
US (1) | US20220065265A1 (en) |
EP (1) | EP3951182A4 (en) |
JP (1) | JP2022528013A (en) |
CN (1) | CN111911419A (en) |
WO (1) | WO2020228584A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20200191164A1 (en) * | 2018-12-17 | 2020-06-18 | Bestway Inflatables & Material Corp. | Motor rotor for water pump, water pump, and pool circulation system |
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FR2588323B1 (en) * | 1985-10-09 | 1990-02-23 | Ngk Insulators Ltd | MAGNETICALLY DRIVEN CENTRIFUGAL PUMP |
JPS62148795U (en) * | 1986-03-12 | 1987-09-19 | ||
JPH0276191U (en) * | 1988-11-30 | 1990-06-11 | ||
US5184945A (en) * | 1991-12-27 | 1993-02-09 | Assoma, Inc. | Bushing structure for using in magnetically driving centrifugal pumps |
JPH10311293A (en) * | 1997-05-13 | 1998-11-24 | Japan Servo Co Ltd | Canned motor pump |
US6443710B1 (en) * | 1999-08-10 | 2002-09-03 | Iwaki Co., Ltd. | Magnetic pump |
DE60040809D1 (en) * | 2000-11-30 | 2008-12-24 | C D R Pompe S P A | MECHANICAL, MAGNETIC POWERED DRIVE DEVICE |
AUPR369901A0 (en) * | 2001-03-13 | 2001-04-12 | Davey Products Pty Ltd | Improved pump |
US7033146B2 (en) * | 2003-01-08 | 2006-04-25 | Assoma Inc. | Sealed magnetic drive sealless pump |
CN101929465B (en) * | 2009-06-19 | 2013-12-11 | 德昌电机(深圳)有限公司 | Drainage pump |
KR101490901B1 (en) * | 2009-11-19 | 2015-02-09 | 현대자동차 주식회사 | Electric water pump |
TW201320547A (en) * | 2011-11-03 | 2013-05-16 | Assoma Inc | Structural improvement for magnetic driven pump |
CN104118473B (en) * | 2014-07-14 | 2016-04-20 | 阜新德尔汽车部件股份有限公司 | Vehicle power steering electricity consumption liquid pump |
EP3218606B1 (en) * | 2014-11-13 | 2019-02-13 | Caprari S.p.A. | Electric pump with closed loop cooling system |
DE102015100215B4 (en) * | 2015-01-09 | 2021-01-14 | Pierburg Gmbh | Side channel blower for an internal combustion engine |
DE212016000048U1 (en) * | 2015-02-04 | 2017-10-05 | Industrie Saleri Italo S.P.A. | Pump group with cooled electronic control device |
CN204492951U (en) * | 2015-02-10 | 2015-07-22 | 裴东良 | A kind of temperature control electronic water pump |
CN106907348B (en) * | 2015-12-23 | 2021-04-09 | 德昌电机(深圳)有限公司 | Impeller and pump using same |
DE102016206406A1 (en) * | 2016-04-15 | 2017-10-19 | Bühler Motor GmbH | Pump motor with a containment shell |
DE102016209311A1 (en) * | 2016-05-30 | 2017-11-30 | Bühler Motor GmbH | ELECTRIC CIRCULAR PUMP |
CN106208591A (en) * | 2016-09-28 | 2016-12-07 | 哈尔滨理工大学 | A kind of Novel electric liquid pump |
JP2018076786A (en) * | 2016-11-07 | 2018-05-17 | アイシン精機株式会社 | Motor pump |
DE102017109253B4 (en) * | 2017-04-28 | 2022-03-31 | Nidec Gpm Gmbh | Coolant pump with pressure-compensating media separation |
JP6937182B2 (en) * | 2017-07-25 | 2021-09-22 | 日本電産サンキョー株式会社 | Motor and pump equipment |
-
2019
- 2019-05-10 CN CN201910388656.8A patent/CN111911419A/en active Pending
-
2020
- 2020-05-07 JP JP2021567058A patent/JP2022528013A/en active Pending
- 2020-05-07 EP EP20806881.7A patent/EP3951182A4/en not_active Withdrawn
- 2020-05-07 WO PCT/CN2020/088977 patent/WO2020228584A1/en unknown
-
2021
- 2021-11-10 US US17/523,387 patent/US20220065265A1/en not_active Abandoned
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20200191164A1 (en) * | 2018-12-17 | 2020-06-18 | Bestway Inflatables & Material Corp. | Motor rotor for water pump, water pump, and pool circulation system |
Also Published As
Publication number | Publication date |
---|---|
EP3951182A1 (en) | 2022-02-09 |
EP3951182A4 (en) | 2022-06-29 |
JP2022528013A (en) | 2022-06-07 |
CN111911419A (en) | 2020-11-10 |
WO2020228584A1 (en) | 2020-11-19 |
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